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How United Kingdom ranks worldwide on dormant space, the transfer market, routing security and address density.
PeeringDB-registered presence.
APNIC-measured end-user deployment.
Clean prefixes (valid RPKI + IRR, no mismatch).
Cumulative IPv4, IPv6, and ASN allocations to United Kingdom over time.
The largest autonomous systems registered to United Kingdom by IPv4 footprint.
United Kingdom against its land-border neighbours on IPv4, IPv6, AS numbers and per-capita density.
Share of announced address space covered by valid Route Origin Authorizations.
3,143 autonomous systems registered to United Kingdom. Click an AS for detail.
| AS5378GB | Vodafone Limited | 2.8M | 24 |
| AS6871GB | Plusnet British Telecommunications Limited | 2.1M | 63 |
| AS8220GB | COLT COLT Technology Services Group Limited | 1.5M | 172 |
| AS212238GB | CDNEXT Datacamp Limited | 1.2M | 4,613 |
| AS206067GB | H3GUK Hutchison 3G UK Limited | 1.1M | 404 |
| 58.4K |
| 229.9K |
| 44 |
| AS29107GB | SYNAPSE-AS Synapse Network LTD | 58.9K | 2 | 25 |
| AS8435GB | LBG_INTERNET_EDGE Lloyds Banking Group PLC | 60.7K | — | 47 |
| AS205544GB | LEASEWEB-UK-LON-11 Leaseweb UK Limited | 62.5K | 11.5M | 115 |
| AS212465GB | COMCAST-UK-2 Comcast International Holdings UK Limited | 62.5K | 38 | 20 |
| AS202596GB | GNETWORK GNC Realisations 2026 Limited | 64.3K | — | 49 |
| AS215540GB | GCS-AS GLOBAL CONNECTIVITY SOLUTIONS LLP | 64.5K | 37 | 275 |
| AS212655GB | youfibre YouFibre Limited | 65.3K | 524.5K | 40 |
| AS39400GB | LBH-AS London Borough of Hackney | 65.8K | — | 2 |
| AS201773GB | UOW-AS University of Warwick | 65.8K | — | 2 |
| AS21296GB | ASN-PwC-UK Pricewaterhousecoopers Services Limited | 66.6K | — | 5 |
| AS50292GB | STRATOGEN Access UK Ltd | 66.8K | — | 37 |
| AS30740GB | EXA-NETWORKS Exa Networks Limited | 67.1K | 524.3K | 5 |
| AS24775GB | AS24775 Qinetiq Limited | 69.6K | — | 2 |
| AS35575GB | VAIONI Vaioni Group Ltd | 73K | 131.1K | 37 |
| AS31727GB | NODE4-AS Node4 Limited | 78.8K | 131.1K | 145 |
| AS16082GB | SPITFIRE Spitfire Network Services Limited | 79.9K | 65.5K | 13 |
| AS51561GB | AS-ICUK ICUK Computing Services Limited | 80.1K | 65.5K | 74 |
| AS60187GB | LGFL-AS London Grid for Learning Trust | 81.7K | 786.4K | 49 |
| AS2818GB | BBC BBC | 81.9K | 196.6K | 7 |
| AS61323GB | UKFAST ANS ACADEMY LIMITED | 82.7K | 589.8K | 66 |
| AS15601GB | Baring Investment Services Ltd | 82.9K | — | 3 |
| AS214238GB | iwihost HOST TELECOM LTD | 84.5K | — | 330 |
| AS29550GB | SIMPLYTRANSIT Team Blue Carrier Limited | 86K | 69.6K | 14 |
| AS24867GB | Adapt-AS Rackspace Ltd. | 86.3K | — | 14 |
| AS31515GB | AS-INMARSAT Inmarsat Global Limited | 88.3K | 65.5K | 58 |
| AS21267GB | Wavenet-AS21267 Wavenet Limited | 89.6K | 65.5K | 64 |
| AS42973GB | METRONETUK_M24SEVEN Convergence Group (Wireless) Networks Limited | 95.7K | — | 62 |
| AS25160GB | VORBOSS Vorboss Limited | 97K | 1.6M | 37 |
| AS49758GB | LLOYDSBANKING Lloyds Banking Group PLC | 98.3K | — | 11 |
| AS48101GB | TROOLI-AS Trooli Ltd. | 99.1K | 459K | 75 |
| AS5503GB | RMIFL RM Education Ltd | 99.3K | 65.5K | 41 |
| AS12701GB | BARCAP Barclays Bank plc | 100.1K | — | 33 |
| AS16247GB | M247-UK Convergence Group (Wireless) Networks Limited | 100.6K | 98.3K | 236 |
| AS39326GB | HSO-GROUP Syntura Group Limited | 104.7K | 655.6K | 35 |
| AS21433GB | AccentureFSSC Accenture UK Limited | 105.5K | 107 | 388 |
| AS44574GB | A4N Network Services Ltd. | 106.2K | 524.3K | 28 |
| AS58065GB | PacketExchange Orion Network Limited | 106.5K | 7 | 420 |
| AS8586GB | OBSL-AS TalkTalk Communications Limited | 108K | 65.5K | 17 |
| AS56329GB | GIGACLEAR Gigaclear Limited | 110.6K | 1.1M | 34 |
| AS3223GB | VOXILITY Voxility LLP | 111.4K | 285 | 412 |
| AS13213GB | UK2NET-AS THG HOSTING LIMITED | 111.4K | 1 | 127 |
| AS6908GB | DATAHOP Six Degrees Technology Group Limited | 113.2K | 786.4K | 48 |
| AS42831GB | UKSERVERS-AS UK Dedicated Servers Limited | 114.7K | 721.2K | 279 |
| AS214143GB | skydigital-telecom SKYDIGITAL TELECOM LTD | 117.2K | — | 291 |
| AS41354GB | its-tg ITS Technology Group Limited | 119.3K | 528.4K | 45 |
| AS5587GB | ITILITY-LIMITED Itility Limited | 121.9K | 524.3K | 14 |